exam Maths Puzzle Numerical Ability

{{{(1+sqrt(3))/(sqrt(3)-sqrt(2))}}} thanks for the help. Steven

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The questions is:

There are 700 students that watch TV. 45% are men. If the confidence interval is 95% what is the true proportion of men that watch tv.

What is the correct formula?
equation of an ellipse with a major axis of length 8 and foci at (-2,6) and (-8,6)